Paper bag



Aug. 1,8, 1925. 1,549,832

c. w. HARTMNN PAPER BAG nl qdqun. so, 1923 Ilm/e111? or C. W'. `Hrbma1ub I FJ MM/M Ii/15236 v -gianna Aug. 1s, 19`25 PATENT OFFICE.`

cAnL WILHELM HARTMANN, or oorENnAemt, nEmlAnx.

l I'Arnia. BAG.

Application illed June $0, 1923. Serial No. 648,774;

To all whom t may concat/"n:

Be it known that I, CARL WILHELM HART- MANN, a subject of the Kin ofv Denmark, residing at Copenhagen, int 1e Kingdom of Denmark, have invented certain new and useful* Improvements in and Relating to Paper Bags, 'of which the following is a specification.

My invention relates to a process and a machine for making paperh bags of the fiat bag type in which each bag is sealed by the lengthwise folding of one or both of the pieces of paper constituting the bag, the

folded portion or portions of one piece being pasted on to the other piece.

The present invention is characterized in that a bag of the above type has the bottom which is formed by a cross paste stripe cutA some distance neath the cross paste stripe. In the production of my said paper bag, the paper or web of paper is only folded lengthwise, the crosswise folding as when forming the bottom of the ordinary fiat bags being avoided. The bottom of my said bag is formed only by pasting together t-he two webs of paper. by means of a cross stripe of paste, the bag after the pasting being cut a certain distance from the said paste stripe so that the' edges which are forming the mouth of the following bag, produced from the webs, are free from paste. v

Bags of this kind are preferably produced from two rolls or webs of paper. The two webs are folded lengthwise so as to overlap each other. Beforethe overlapping the free edges are pasted. With suitable intervals correspondln to the desired length of the bag, one of t e webs is provided with the said paste cross stripes inward in the bag. `After the pasting together the two webs are cut a little distance from the paste cross stripe.

My invention is 'diagrammatically shown on the accompanying drawings, Figs. 1 and 2 showing two forms ofthe bag and Fig. 3'

a machine for producing it.

In the bags shown in Figs. 1 and 2 the folded edges are designated at 4, and the cross pasting of theI bottom 5. The d iierj ence between the two bag forms shown, is

that the webs'of paper 6 and 7 4from which the bag according to Fig. 1 is produced have the same breadth and are folded. each on its v i suitable intermittent on the side `turning and finally cutting the joined side, while the `webs according to Fig. 2 have diilerent breadth the broadest of them being folded at both edges so as to overlap the narrowest. i L

I n- Flg. 3 the two rolls of aper from which the webs 6 and 7 are woun are designated at 8 and 9 respectively. It is undermeans of a Vsuitable pasting roll 10. The cross pastlng with certain intervals is only done at the narrowest pasting effected by ',a roller 11. The two asted webs run together at a roll 12 t e breadth of which corresponds to that of the narrowest web. Here commences the pasting together by means of the pasted cross stripe and the folding of the free pasted length edges of the broadest web. The complete folding is carried out at the y oint 13 subsequent to leaving the roller 12 some suitable folding means of known kin after which the two webs pass betweenma roll 14 and an endless pressure belt 15, where the final pasting together takes place. Afterv this the webs are cut by means of a suitable periodic e. g. rotating cutting'device 16, which works exactly in correspondence with the intermit-` tent pasting roller 11 in such a way that the cut every time comes to lie a certain little.

applying paste transversely at suitable intervals to' one of the webs duringthe feed--` ing, then folding and joiningl the longitudinal pasted edges of the webs, the pasted portions of the webs webs at .suitable distances fromrthe transversely joined portions.

In witness whereof, I nature.

CARL WILHELM HARTMANN.

the vformer is continuously pasted on its edges by web 7 by means of a v then joining transversely,

subscribe my sig- 

